Pretty much just more Sin but with new good and bad things added. The good is that the new weapons and gadgets introduced are pretty fun to use. The inclusion of thermal goggles and a backpack rocket launcher are the particular highlights. There are also some neat levels such as one where you have to rob a casino and raid a penthouse.

The bad comes in the form of the new mutant enemy types which I found were either annoying to deal with or just uninspired. All the new enemy types also don't have the fun gore effects that the normal enemies have. There are also some annoying levels such as a shipping yard that was just plain confusing to navigate, I swear there's not one good shipping yard level in video games.

It doesn't add a whole lot that wasn't already there in the base game but it has its moments and continues the story if you are one of the few people that desperately cares about the story of Sin.